Calhoun County, Iowa ZIP codes
10 ZIP codes are in Calhoun County, plus 5 that cross in from neighboring counties.
- ZIP codes
- 10
- Population in these ZIPs
- 10,375
- Avg. median income
- $67,400population-weighted
- Cities & towns
- 10
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Calhoun County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 50538 | Farnhamville | 661 | $62,344 | $122,200 |
| 50551 | Jolley | 96 | — | $51,100 |
| 50552 | Knierim | 76 | $89,000 | $112,500 |
| 50561 | Lytton | 585 | $67,446 | $145,000 |
| 50563 | Manson | 2,505 | $71,094 | $194,900 |
| 50575 | Pomeroy | 696 | $52,717 | $97,600 |
| 50579 | Rockwell City | 3,034 | $61,108 | $153,000 |
| 50586 | Somers | 272 | $55,375 | $89,100 |
| 51449 | Lake City | 1,950 | $75,329 | $150,500 |
| 51453 | Lohrville | 500 | $86,563 | $121,100 |
ZIP codes partly in Calhoun County
These ZIP codes are mostly in a neighboring county but cover part of Calhoun County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 50050 | Churdan | Greene County | 712 | $64,432 | $182,700 |
| 50540 | Fonda | Pocahontas County | 998 | $73,438 | $109,900 |
| 50566 | Moorland | Webster County | 325 | $78,750 | $192,000 |
| 50583 | Sac City | Sac County | 2,288 | $62,981 | $148,700 |
| 51433 | Auburn | Sac County | 567 | $68,125 | $179,300 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Calhoun County
Nearby counties
Frequently asked questions
How many ZIP codes are in Calhoun County, Iowa?
10 ZIP codes are mainly in Calhoun County, and 5 more ZIP codes from neighboring areas reach partly into it.
What cities are in Calhoun County?
ZIP codes in Calhoun County use the city names Farnhamville, Jolley, Knierim, Lake City, Lohrville, Lytton, Manson, Pomeroy, Rockwell City and Somers.